78261619368 has 16 divisors (see below), whose sum is σ = 195654048480. Its totient is φ = 26087206448.

The previous prime is 78261619367. The next prime is 78261619417. The reversal of 78261619368 is 86391616287.

It is a super-2 number, since 2×78261619368² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78261619367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1630450380 + ... + 1630450427.

It is an arithmetic number, because the mean of its divisors is an integer number (12228378030).

Almost surely, 2^78261619368 is an apocalyptic number.

It is an amenable number.

78261619368 is an abundant number, since it is smaller than the sum of its proper divisors (117392429112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78261619368 is a wasteful number, since it uses less digits than its factorization.

78261619368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3260900816 (or 3260900812 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 57.

The spelling of 78261619368 in words is "seventy-eight billion, two hundred sixty-one million, six hundred nineteen thousand, three hundred sixty-eight".